National standard seamless steel pipes are steel pipes produced in accordance with relevant parameters such as diameter and wall thickness, allowable deviations of diameter and wall thickness, curvature, ovality, end shape, fixed length and multiple lengths of steel pipes stipulated in national standards. Non-standard seamless steel pipes are: (1) steel pipes produced in whole or in part that do not meet national standards; (2) steel pipes produced according to various parameters agreed upon by both supply and demand parties.
Non-standard seamless steel pipes are special shape steel pipe other than the national standard compared to the Chinese national standard seamless steel pipes. In the production of seamless steel pipes, they are classified according to the national regular requirements, the size of the outer diameter and the wall thickness, and are allowed to have There is a certain error, and the error within the standard range is collectively called the national standard.
In practical applications, the national standard specifications often have certain limitations, which leads to the emergence of non-standard seamless steel pipes. The specifications of non-standard steel pipes are produced to supplement the deficiencies of the national standard seamless steel pipe specifications. They are not It is said that the quality is worse than the national standard seamless steel pipe.
Commonly used materials for non-standard steel pipes are: ASTM A106 /A53 GR.B Heavy Wallthickness Seamless Steel Pipe、SAE 1045/S45C Thick Wall Seamless Steel Pipe、DIN2391 ST52 Hot Rolled Seamless Steel Pipe、27SiMn Alloy Seamless Steel Pipe、20Cr Alloy Seamless Steel Pipes、40Cr Alloy Seamless Steel pipe.
We can provide hot-rolled non-standard seamless steel pipes in the following specifications.
Post time: Mar-15-2024